Herbal soother (4)
I believe the answer is:
aloe
'herbal soother' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aloe that I've seen before include "Fleshy-leaved plant" , "Succulent plant (may be bitter!)" , "has a bitter taste" , "Flower, maybe vera" , "Bitter fruit" .)